Problem Running Example..

//The Compiler used is Turbo C, I dont know if it will compile in others also.
//Didn't Compile in Microsoft C Compiler. Make the respective change then.
//The function geninterrupt() generates interrupts, it is defined in dos.h
//_AX,_BX,_CX,_DX are defined in dos.h & correspond to ax,bx,cx,dx registers respectively.
//Make a header file out of this one and use it in your programs.
#include<dos.h>//this header file is necessary
#include<stdio.h>//only for displaying messages
#include<conio.h>//for other stuff like getch() etc.
unsigned initmouse()
{
	_AX=0;
	geninterrupt(0x33);	//Generate Inpterrupt
	return _AX;
}

void showmouse()
{
	_AX=1;
	geninterrupt(0x33);
}

void hidemouse()
{
	_AX=2;
	geninterrupt(0x33);
}

void restrictmouse(int x1,int y1,int x2,int y2)
{
	_AX=7;
	_CX=x1;
	_DX=x2;
	geninterrupt(0x33);
	_AX=8;
	_CX=y1;
	_DX=y2;
	geninterrupt(0x33);
}

void getmouse(int *button,int *x,int *y)
{
	_AX=3;
	geninterrupt(0x33);
	*button=_BX;
	*x=_CX;
	*y=_DX;
}

void setmouse(int x,int y)
{
	_AX=4;
	_CX=x;
	_DX=y;
	geninterrupt(0x33);
}

void main()
{
	int x,y,button;
	clrscr();
	gotoxy(29,18);
	textbackground(GREEN);
	cprintf("EXIT");
	gotoxy(1,1);
	if(initmouse()==0)
	{
		printf("Mouse support unavailable");
		return;
	}
	printf("\n\nPress any key to Show Mouse");
	getch();
	showmouse();
	printf("\nPress any key to Hide Mouse");
	getch();
	hidemouse();
	printf("\nPress any key to Show Mouse again");
	getch();
	restrictmouse(208,80,416,160);
	showmouse();
	printf("\nMouse has been restricted");
	printf("\nPress on Exit button to quit the Program");
	while(1)
	{
		getmouse(&button,&x,&y);
		gotoxy(35,1);
		printf("Coordinates:-(%d,%d)  ",x,y);
		gotoxy(35,2);
		if(button&1)//<- Here '&' means ANDing, remember bitwise operators of C/C++
			printf("Left button pressed  ");
		else if(button&2)
			printf("Right button pressed ");
		else if(button&4)
			printf("Center button pressed");
		else
			printf("No button Pressed    ");
		if(x>=224&&x<=248&&y==136&&button==1)//checks if exit button is pressed or not
			break;
	}
}